The code to stop all brain tasks is required to pass the current
game time to the tasks it stops. But, when a villager is being
portalled, the copied entity does not have any running tasks. So,
we can simply return early before invoking getGameTime if there
are no running tasks.
Fixes https://github.com/PaperMC/Folia/issues/23
Everyone had access to /tps for the private tests, but we cannot
trust everyone to use it responsibly for the public test
(i.e revealing coordinates of all logged in players).
